Breaker bar for web rewinding machine



p 1964 T/M. TURNER ETAL BREAKER BAR FOR WEB REWINDING 'IMACHINE 4Sheets-Sheet 1 Filed Oct. 9, 1959 INVENTORS THOMAS M. TURNER WILLIAM H.JAQUES JOHN J. BRADLEY BY M H m-HFMHI ATTO RNEY 1'. M. TURNER ETALBREAKER BAR FOR WEB REWINDING MACHINE Filed Oct. 9, 1959 4 Sheets-Sheet2 ATTO RN EY Sept. 15, 1964 T. M. TURNER ETAL BREAKER BAR FOR WEBREWINDING MACHINE Filed on. 9, 1959 4 Sheets-Sheet 3 i I F] 1: I m 8% HP 1; o 6) (X) l f moui ir'lfiia WlLLIAM H. JAQUES JOHN J. BRADLEY BY Qpm/W ATTORNEY p 15, 1954 1'. M. TURNER ETAL 3,148,843

BREAKER BAR FOR was REWINDING MACHINE Filed Oct. 9, 1959 4Sheets-Sheet.4

mvlu'rons THOMAS M. TURNER WILLIAM H. UES

JOHN J. BR EY A'I'TO RN EY United States Patent 3,148,843 BREAKER BARFOR WEB REWINDIN MACE Thomas M. Turner and William H. Jaques,Cincinnati, and John J. Bradley, Terrace Park, Ohio, assignors, by mesneassignments, to FMC Corporation, San Jose, Calif., a corporation ofDelaware Filed Oct. 9, 1959, Ser. No. 845,415 '1 Claim. (Cl. 24256) Thisinvention pertains to machines for winding toilet tissue, papertoweling, or like materials into marketable size rolls. Moreparticularly, the invention is directed to a novel web breakingmechanism for use in such a machine.

In the preparation of toilet tissue, paper toweling and like materialsfor market, a large, mill size parent roll of sheet. material is placedon a rewinding machine. The web is unwound from the parent roll and asit passes through the machine it is perforated transversely at regularintervals to divide it into individual sheets, slit longitudinally intomarketable roll size widths, and then rewound into rolls of marketablediameter. When a roll being wound reaches marketable diameter the webmust be broken or severed transversely and a new roll started.

It is an object of this invention to provide a novel mechanism forbreaking the web when the roll being wound reaches marketable diameter.

Another object of the invention is to provide a web breaking mechanismwhich produces a sharp straight break across the full width of the web.

Another object of the invention is to provide a web breaking mechanismcapable of producing a straight clean break across the web while the webis moving at high velocity.

These and other objects and advantages of the instant invention willbecome apparent from the following detailed description and theaccompanying drawings, in which:

FIG. 1 is a section through a rewinding machine incorporating thebreaker arm assembly of the present invention.

FIG. 2 is a fragmentary section on the same plane as FIG. 1 andillustrates the breaker arm assembly in an alternative position.

FIG. 3 is a fragmentary section taken generally on line 33 of FIG. 2 andillustrates the mounting structure of the breaker arm.

FIGS. 4-7 are fragmentary sections similar to FIG. 2 and illustrate thebreaker arm assembly in various phases of its cycle of operation.

In the rewinding machine 16 illustrated in FIG. 1, cores 12 mounted onsuitable rollers or mandrels 14 are introduced to the machine at stationA. The mandrels 14 are gripped between suitable spindles 16 provided atspaced points along two parallel endless chains located adjacent theopposite sides of the machine, one of said chains being shown at 18. Thecores are carried by the endless chains past a core cutting station B,at which station the cores 12 are cut into individual roll size lengthsby cutters 20. The cores 12 next pass an adhesive applying station Cwhere adhesive is applied to the cores 12 by a roller or rollers 22. Thecores then progress to the winding station D. After the rolls are woundonto the cores 12 in the manner described hereinbelow, the finishedrolls 24 are discharged from the machine at E.

The paper web W enters from a mill or parent roll (not shown) through aperforating mechanism P which perforates the paper web W along evenlyspaced transverse lines. The web W then passes through a longitudinalsplitting mechanism G which slits the web W longitudinally into stripsof marketable width. When a roll 24a being wound on a core 12a at thewinding station D reaches marketable diameter the breaker arm assembly Hof the present invention is actuated to break the web W in the mannerillustrated in FIG. 2, and a new roll is started on the next succeedingcore 12b in a manner described hereinbelow.

The driving mechanism for rotating the rolls 24 as they are being woundcomprises a plurality of endless belts 30 (FIGS. 2 and 4) each of whichfrictionally engages the periphery of one of the rolls 2411 being woundand rotates it at the same peripheral velocity as the linear velocity ofthe web W. The belts 30 are trained around suitable drums 32 and 34. Theshaft 36 of the upper drum 32 is rotatably mounted in suitable bearings(not shown) carried by horizontal slide blocks one of which is shown at38. Each slide block 38 is mounted in a suitable guide groove 4% on theside frame of the machine. The shaft 42 of the lower drum 34- is mountedin suitable bearings (not shown) carried by swinging brackets one ofwhich is shown at 44. The swinging brackets are mounted for pivotalmovement about the axis of the shaft 36 of the upper drum 32 so that thebelts 30 can swing outwardly as the diameter of the rolls 24a beingwound increases. Within the winding station D the chains 18 travelthrough chain guides 50 which hold the chains so as to retain the rolls24 in contact with the drive belts 30 while they are being wound.

An arm 52 is fixed to the slide block 38 and rotatably carries on itsouter end a cam follower roller 54 which rides on the periphery of a cam56. The cam 56 when actuated moves the upper end of the winding driveassembly to the left as viewed in FIG. 2 to push the empty core 12entering the winding station into contact with the web W as the lattertravels over the roller 58 of the slitting assembly G to properly startthe operation of winding the roll.

The breaker arm assembly comprises a shaft 64 rotatably mounted bysuitable bearings one of which is shown at 62 (FIG. 3) on two stubshafts 64 and 66 fixed to the opposite side frames of the machine. Twoarms 68 and 70 (FIG. 3) are fixed to the shaft 60 and project upwardlytherefrom. A breaker bar 72 extends between and is fixed to the outerends of the arms 68 and 70. The breaker bar 72 is provided with a flangeportion 74 which is turned inwardly toward the path of travel of the webW and is provided with a rounded nose portion 76.

An actuating arm '78 is fixed to the shaft 60 and rotatably carries acam follower roller it which rides on the periphery of an actuating cam82. An arm 84- is fixed to the shaft 60 and a spring 86 fixed betweenthe arm 84 and a pin 88 on a side frame of the machine maintains theroller 3i? in contact with the cam 82.

A brush 90 extends transversely of the machine immediately below thebreaker bar 72 and is in contact with each finished roll 24 as thebreaker arm is actuated and for a short period of time thereafter. Thebrush 90 is fixed to an angle bar 92 which in turn is fixed at itsopposite ends to the upper ends of two bracket arms 94 and 96. Thebracket arms 94 and 96 are fixed at their lower ends to a transverseframe member 98.

In the operation of the machine, the cores 12, having previously beenmounted on mandrels 14, are introduced into the machine at station A andare successively picked up and clamped between the spindles 16 on theendless chains 18. The cores 12 pass through the cutting station E wherethey are severed into individual core sections each the width of thefinal marketable size roll and through the station C where an adhesiveis applied to the cores 12. The cores 12 then approach the windingstation D.

As the web approaches the winding station D, it first passes through thetransverse perforating mechanism F 2.9 whence it passes through thelongitudinal slitting mechanism G which divides it into a plurality ofstrips each of which corresponds in width to one of the core sections.After passing over the roller 58 of the slitting mechanism G, theseveral strips pass to the rolis 24a being rotated by the action of theroll driving belts 31). As the rolls 24!: increase in size they areslowly advanced by the chains 18 until they reach marketable diameter atabout the position illustrated in FIG. 4.

As the substantially fully wound rolls 24a reach the positionillustrated in FIG. 4, the cam 82 has started to move the breaker bar'72 to the right as viewed in that figure, i.e., inward toward the web Wfar enough for the rounded nose '76 to just contact the web W. Continuedinward movement of the breaker bar 72 causes a deflection of the portionof the web W between the roller 58 and the rolls 24a in the mannerillustrated in FIG. 5. This deflection increases the length of the web Wbetween the roller 58 and the rolls 24a. Since both the roller 58 andthe rolls 24a are traveling at the same peripheral velocity, and sinceboth have considerable inertia, the portion of th web between the roller58 and the rolls 24a is stretched slightly, thus generating a tensileforce therein. As the deflection of Web W is increased, so is thetensile force increased. Since the rounded nose portion 76 of thebreaker bar 72 additionally applies a frictional drag to the web W, thetensile force in the web W below the point of contact of the noseportion 76 of the breaker bar '72 will be greater than the tensile forceabove said point of contact.

The breaker bar 72 continues its advance until the tensile force in theportion of the web W between the nose 76 of the breaker bar 72 and therolls 24a is sufiicient to cause the web W to sever along one of thepreviously formed transverse lines of perforations as illustrated inFIG. 6.

The various elements are so positioned that only one such line ofperforations is located at any time in the zone of high tensile stress,namely, between the nose portion 76 of the breaker bar '72 and theperiphery of the roll 24a, whereby, the web W will be severed cleanly inthe one straight line of perforations, completely across the full widthof the web.

While the breaker arm 72 has been moving in to break the web W in themanner described above, the cam 56 has been moving the upper end of thewinding drive assembly to the left as illustrated in FIG. 6 so that thebelts 30 have started the succeeding core 12b rotating, and at the timethe web W breaks, the inward deflection of the web by the breaker bar,which has caused the newly developed leading end region of the web toextend between the completed rewound roll and the next succeeding emptycore 12b, aids in applying the web to the core and in starting the newlyformed end region to wrap around the core, as illustrated in FIGS. 2 and6. The adhesive previously applied to the core 121) at station C causesthe now loose end of the web W to adhere to the new core 12b to startthe winding of a new roll 24b in the manner illustrated in FIG. 7.

It will be noted that when the web W is severed, the nearly completedroll 24a is in contact with the brush so that the latter brushes thesevered end smoothly onto the roll 24a. This contact with the brush 90is maintained after the roll 24a passes beyond the drive belts 30 andthe frictional force of the contact of the brush 90 slows and stops therapidly rotating finished roll 24a which then is subsequently dischargedfrom the machine at station E.

While a preferred embodiment of the invention has been shown anddescribed herein, it should be noted that various changes may be madetherein without departing from the spirit of the invention as defined inthe appended,

claim.

The invention having thus been described, what is claimed and desired tobe protected by Letters Patent is:

In a machine for rewinding web having spaced apart lines ofweb-weakening perforations, said rewinding machine having means formoving a series of adhesive-covered cores successively past a web guideroller, 2. web severing and roll starting mechanism comprising a breakerbar mounted for movement in a path intersecting the path normallyfollowed by the web being pulled from said guide roller to the rollbeing wound, means on the breaker bar for making frictional slidingengagement with the web, and means operable to project the bar to andthrough said path of movement of the web in a region spaced from theroll being wound a distance less than the spacing between said lines ofperforations to impose additional tension upon the web between thebreaker bar and the roll being wound while the web is being dragged overthe breaker bar in sliding frictional engagement therewith and therebypull the web apart at a transverse line of perforations in the webbetween the breaker bar and the roll being wound.

References Cited in the file of this patent UNITED STATES PATENTS1,681,046 Marresford Aug. 14, 1928 2,186,884 Shomaker Jan. 9, 19402,266,995 Schultz et al. Dec. 23, 1941 2,328,582 Ratchford et a1 Sept.7, 1943 2,361,264 Christman Oct. 24, 1944 2,691,490 Gerard Oct. 12, 19542,883,121 Barlament et a1 Apr. 21, 1959 2,902,197 Potdevin et a1 Sept.1, 1959 2,942,796 Gurney et al June 28, 1960

